The impact of uncertain structural parameters on the effectiveness of Tuned Mass Dampers

Mariana Miglio Americano da Costa¹; Daniel Alves Castello¹; Carlos Magluta¹; Ney Roitman¹

¹ COPPE-UFRJ

doi:10.20906/CPS/CILAMCE2017-0756

Resumo

Tuned mass dampers (TMD) may be optimally designed to minimize vibrations in engineering structures. The most suitable parameters for a TMD may be sought by means of the solution of an optimization problem according to a pool of quality metrics. In its simplest approach, the optimization problem assumes that the physical parameters of the main structure are exactly known. Nevertheless, the performance of a TMD is sensitive to deviations of the structural parameters which, by the way, are usually uncertain as a result of their fabrication process and also due to changes in operation scenarios. This paper analyzes the impact of uncertain model parameters on the efficiency of the total system when the sources of uncertainty come from both the original structure and the TMD. The optimal parameters of the TMD were estimated by means of the particle swarm optimization (PSO) algorithm. The classical Monte-Carlo simulation was used to estimate the impact of model uncertainties on the TMD effectiveness.

Palavras-chave: Tuned mass dampers; Monte Carlo simulation; Uncertainty Quantification